Is Subletting Illegal? The Rules for Tenants

In short: Subletting all or part of a private rental usually requires the landlord's written consent, and most tenancy agreements prohibit it without permission; doing so can be a breach leading to possession. Short-letting on Airbnb also needs consent and, in London, planning permission beyond 90 nights a year. Unlawfully subletting a council or housing association home is a criminal offence. Landlords suspecting unauthorised subletting should gather evidence and get advice.